Q. No.Consider the given two statements:
1. Statement I is correct; Statement II is incorrect
2. Statement I is correct; Statement II is correct
3. Statement I is incorrect; Statement II is incorrect
4. Statement I is incorrect; Statement II is correct
| Statement I: | The root apical meristem and the shoot apical meristem are responsible for the primary growth of the plants and cause the increase in the girth of the organs in which they are active. |
| Statement II: | In dicotyledonous plants and gymnosperms, the lateral meristems, vascular cambium and cork-cambium principally contribute to the elongation of the plants along their axis. |
1. Statement I is correct; Statement II is incorrect
2. Statement I is correct; Statement II is correct
3. Statement I is incorrect; Statement II is incorrect
4. Statement I is incorrect; Statement II is correct
Subtopic: Growth | Growth Model | Development | Differentiation, Dedifferentiation and Redifferentiation |
75%
From NCERT
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Match Column I [phase of growth] and Column II [cell characteristics] and choose the correct answer from the codes given:
| Column I | Column II | ||
| A. | Meristematic | a. | Increased vacuolation, new cell wall deposition |
| B. | Elongation | b. | Thin cellulosic wall with abundant plasmodesmatal connections |
| C. | Maturation | c. | Maximal wall thickening |
Codes
| A | B | C | |
| 1. | a | b | c |
| 2. | b | c | a |
| 3. | b | a | c |
| 4. | c | b | a |
Subtopic: Growth | Development |
73%
From NCERT
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What would not be true for the cells in the meristematic region at the root apex?
| 1. | They are constantly dividing cells. |
| 2. | They are rich in protoplasm, possess large conspicuous nuclei. |
| 3. | Their cell walls are primary in nature. |
| 4. | Plasmodesmatal connections between the cells are absent. |
Subtopic: Growth | Growth Model | Development |
88%
From NCERT
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The cells of which zone at the root apex attain their maximal size in terms of wall thickening and protoplasmic modifications?
1. Root cap
2. Meristematic zone
3. Elongation zone
4. Maturation zone
1. Root cap
2. Meristematic zone
3. Elongation zone
4. Maturation zone
Subtopic: Growth | Growth Terminology | Development | Differentiation, Dedifferentiation and Redifferentiation |
76%
From NCERT
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Quantitative comparisons between the growth of living system can be made in two ways where:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | measurement and the comparison of total growth per unit time is called the absolute growth rate. |
| II: | the growth of the given system per unit time expressed on a common basis, e.g., per unit initial parameter is called the relative growth rate. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Growth | Growth Model | Growth Terminology | Development |
91%
From NCERT
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The optimum temperature range for proper growth in most plants is:
| 1. | \(0^\circ C - 100^\circ C\) | 2. | \(15^\circ C - 20^\circ C\) |
| 3. | \(28^\circ C - 30^\circ C\) | 4. | Greater than \(45^\circ C\) |
Subtopic: Growth Terminology | Development |
65%
From NCERT
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The examples of de-differentiation in plants include:
| I: | Formation of a tumour. |
| II: | Parenchyma cells made to divide under controlled laboratory conditions during plant tissue culture. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Growth Terminology | Development | Differentiation, Dedifferentiation and Redifferentiation |
64%
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Development is a term that includes all changes that a plant goes through during its life cycle:
1. till germination of the seed
2. during its vegetative growth
3. from germination till flowering
4. from germination to senescence
Subtopic: Development | Differentiation, Dedifferentiation and Redifferentiation |
87%
From NCERT
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Difference in shapes of leaves produced in air and those produced in water represents heterophyllous development due to environment in:
| 1. | Cotton | 2. | Coriander |
| 3. | Larkspur | 4. | Butter cup |
Subtopic: Development |
78%
From NCERT
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Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:
| 1. | Plasticity | 2. | Norm of the reaction |
| 3. | Development noise | 4. | Acclimatisation |
Subtopic: Development |
97%
From NCERT
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